<template>
	<header class="header">
		<h1>todos</h1>
		<input id="toggle-all" class="toggle-all" type="checkbox">
		<label for="toggle-all"></label>
		<input class="new-todo" placeholder="输入任务名称-回车确认" autofocus 
		v-model.trim="content"
		@keyup.enter="add"
		/>
	</header>
</template>

<script>
	export default {
		data(){
			return{
				content:''
			}
		},
		methods:{
			add(){
				if(this.content.length === 0){
				return alert('请输入内容')
			}
				this.$emit('add',this.content)
				this.content = ''
			}
		}
	}
</script>
